133723915 has 8 divisors (see below), whose sum is σ = 172812528. Its totient is φ = 98749920.

The previous prime is 133723907. The next prime is 133723927. The reversal of 133723915 is 519327331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133723915 - 2³ = 133723907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028581 + ... + 1028710.

It is an arithmetic number, because the mean of its divisors is an integer number (21601566).

Almost surely, 2^133723915 is an apocalyptic number.

133723915 is a deficient number, since it is larger than the sum of its proper divisors (39088613).

133723915 is a wasteful number, since it uses less digits than its factorization.

133723915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057309.

The product of its digits is 17010, while the sum is 34.

The square root of 133723915 is about 11563.9056983357. The cubic root of 133723915 is about 511.3713126474.

It can be divided in two parts, 1337 and 23915, that added together give a palindrome (25252).

The spelling of 133723915 in words is "one hundred thirty-three million, seven hundred twenty-three thousand, nine hundred fifteen".